[1]盛振新,刘荣忠,郭 锐.水下连续爆炸声效应的实验研究[J].南京理工大学学报(自然科学版),2014,38(01):106-110.
　Sheng Zhenxin,Liu Rongzhong,Guo Rui.Experimental research of acoustic effect generated by sequential underwater explosions[J].Journal of Nanjing University of Science and Technology,2014,38(01):106-110.
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水下连续爆炸声效应的实验研究
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《南京理工大学学报》（自然科学版）[ISSN:1005-9830/CN:32-1397/N]

卷:
38卷
期数:
2014年01期
页码:
106-110
栏目:
出版日期:
2014-02-28

文章信息/Info

Title:
Experimental research of acoustic effect generated by sequential underwater explosions
作者:
盛振新; 刘荣忠; 郭 锐
南京理工大学 机械工程学院,江苏 南京 210094
Author(s):
Sheng Zhenxin; Liu Rongzhong; Guo Rui
School of Mechanical Engineering,NUST,Nanjing 210094
关键词:
水下连续爆炸;  时间间隔;  小波变换;  功率谱估计
Keywords:
sequential underwater explosions;  interval time;  wavelet transform;  power spectrum estimation
分类号:
TB561; TJ410.4
摘要:
为了研究水下连续爆炸声信号的特性,利用具有时间间隔的连续爆炸序列作为声源进行试验。将单个爆炸声信号进行滤波,分析2、5和10 kHz的混响信号,得出该水域的散射强度随频率的变化规律; 分析了时间间隔对水下连续爆炸声信号的影响,得出:(1)时间间隔越短,连续爆炸声源产生的冲击波峰值压力和冲击波强度越大。(2)在低频部分,不同时间间隔的连续爆炸声信号的强度相同,在高频部分,时间间隔越短,连续爆炸声信号的强度越高; 即低频信号衰减较慢,高频信号衰减较快。所得结论可为提高水下连续爆炸效应提供一定的理论基础。
Abstract:
Sequential underwater explosions with an interval time are used as an acoustic source to study the characters of signals generated by sequential underwater explosions.The signals generated by single explosion is filtered into 2 kHz,5 kHz and 10 kHz.The reverberation levels at different frequencies are analyzed to obtain the law of scattering strength to frequency.The signal generated by sequential underwater explosions are analyzed using wavelet transform combined with power spectrum estimation.Some conclusions are obtained:(1)the peak pressures of shock waves generated by sequential underwater explosions with shorter interval time is higher,so as the strength of shockwaves;(2)the strength of signals generated by sequential underwater explosions with different interval time spreads uniformly in low frequency range; in high frequency range,the strength of signals generated by sequential underwater explosions with shorter interval time is higher.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2012-05-03 修回日期:2012-06-10
基金项目:江苏省普通高校研究生科研创新计划资助项目(CXZZ11_0270)
作者简介:盛振新(1986-),男,博士生,主要研究方向:新概念战斗部毁伤技术,E-mail:killer860710@163.com。
引文格式:盛振新,刘荣忠,郭锐.水下连续爆炸声效应的实验研究[J].南京理工大学学报,2014,38(1):106-110.
投稿网址:http://njlgdxxb.paperonce.org
更新日期/Last Update: 2014-02-28